3.14*1.9+31.4*0.81d的简便方法计算
问题描述:
3.14*1.9+31.4*0.81d的简便方法计算
答
3.14*1.9+31.4*0.81
=31.4*0.19+31.4*0.81
=31.4*(0.19+0.81)
=31.4